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- W3179105655 abstract "Intracortical neural probes are a key enabling technology for acquiring high fidelity neural signals within the cortex. They are viewed as a crucial component of brain-computer interfaces (BCIs) in order to record electrical activities from neurons within the brain. Smaller, more flexible, polymer-based probes have been investigated for their potential to limit the acute and chronic neural tissue response. Conventional methods of patterning electrodes and connecting traces on a single supporting layer can limit the number of recording sites which can be defined, particularly when designing narrower probes. We present a novel strategy of increasing the number of recording sites without proportionally increasing the size of the probe by using a multilayer fabrication process to vertically layer recording traces on multiple Parylene support layers, allowing more recording traces to be defined on a smaller probe width. Using this approach, we are able to define 16 electrodes on 4 supporting layers (4 electrodes per layer), each with a 30 μm diameter recording window and 5 μm wide connecting trace defined by conventional LWUV lithography, on an 80 μm wide by 9 μm thick microprobe. Prior to in vitro and in vivo validation, the multilayer probes are electrically characterized via impedance spectroscopy and evaluating crosstalk between adjacent layers. Demonstration of acute in vitro recordings in a cerebral organoid model and in vivo recordings in a murine model indicate the probe's capability for single unit recordings. This work demonstrates the ability to fabricate smaller, more compliant neural probes without sacrificing electrode density." @default.
- W3179105655 created "2021-07-19" @default.
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- W3179105655 date "2021-08-01" @default.
- W3179105655 modified "2023-10-03" @default.
- W3179105655 title "Fabrication of a Multilayer Implantable Cortical Microelectrode Probe to Improve Recording Potential" @default.
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- W3179105655 doi "https://doi.org/10.1109/jmems.2021.3092230" @default.
- W3179105655 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/8445332" @default.
- W3179105655 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/34539168" @default.
- W3179105655 hasPublicationYear "2021" @default.
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